delete unused functions
a few comments

checkpoint: write(fd,"hello\n",6) where fd is a console dev almost works

iget
mkfs makes a file system image
put this in your .bochsrc:
ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1

pipes

and plan 9 code, at least boots and gets into C code.